This company is the most unprofessional, dishonest and fraudulent factory we ever cooperated. Unfortunately we noted to late. We ordered many containers of bicycles with an exact specification of parts. Hangzhou Dongling assembled faked and copied, cheap parts, so we couldnt sell this products in europe. The whole container was defect. We lost more than 60000 USD, and got no reperation or compensation to this day. We would expressly warn you not to cooperate with Hangzhou Dongling, because they tell a lie all the day long.